Elements of basic communication system
- Information source
In the transmission section, first of all, the source-generated information is fed to the input transducer, which converts the energy of one form to another form, usually in the electrical form. This electrical signal or baseband signal is sent to the transmitter.
- Transmitter:
The transmitter modifies the information signal for efficient transmission. It modulates the information signal with a high-frequency carrier. After processing the signal transmitter transmits the signal through the channel to the receiver.
- Channel:
Channel, media, or path implies the medium through which the message travels from the transmitter to the receiver. A channel acts partly as a filter to attenuate the signal and distorts its waveform. The signal attenuation increases with the length of the channel. There are different types of channels exist for different communication systems, such as wire, coaxial cable, wave-guide, optical fiber, or radio link through which transmitter output is sent.
- Receiver:
The receiver reprocesses the signal received from the channel by undoing the signal modifications made at the transmitter and the channel. The receiver output is fed to the output transducer, which converts the electrical signal to its original form. In this way, the signal reaches its destination, to which the message is communicated.
- Destination (where the information will be placed)
